LTC2325-16
Quad, 16-Bit, 5Msps/Ch
Simultaneous Sampling ADC
FEATURES
DESCRIPTION
The LTC®2325-16 is a low noise, high speed quad 16-bit
successive approximation register (SAR) ADC with
differential inputs and wide input common mode range.
Operatingfromasingle3.3Vor5Vsupply,theLTC2325-16
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5Msps/Ch Throughput Rate
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Four Simultaneously Sampling Channels
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Guaranteed 16-Bit, No Missing Codes
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8V Differential Inputs with Wide Input
P-P
Common Mode Range
has an 8V differential input range, making it ideal for
P-P
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82dB SNR (Typ) at f = 2.2MHz
applicationswhichrequireawidedynamicrangewithhigh
commonmoderejection.TheLTC2325-16achieves 2LSB
INL typical, no missing codes at 16 bits and 82dB SNR.
IN
IN
–88dB THD (Typ) at f = 2.2MHz
Guaranteed Operation to 125°C
Single 3.3V or 5V Supply
TheLTC2325-16hasanonboardlowdrift(20ppm/°Cmax)
2.048V or 4.096V temperature-compensated reference.
The LTC2325-16 also has a high speed SPI-compatible
serial interface that supports CMOS or LVDS. The fast
5Msps per channel throughput with one cycle latency
makes the LTC2325-16 ideally suited for a wide variety
of high speed applications. The LTC2325-16 dissipates
only 40mW per channel and offers nap and sleep modes
to reduce the power consumption to 90μW for further
power savings during inactive periods.
Low Drift (20ppm/°C Max) 2.048V or 4.096V
Internal Reference
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1.8V to 2.5V I/O Voltages
CMOS or LVDS SPI-Compatible Serial I/O
Power Dissipation 40mW/Ch (Typ)
Small 52-Pin (7mm × 8mm) QFN Package
APPLICATIONS
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High Speed Data Acquisition Systems
L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks and
ThinSOT is a trademark of Linear Technology Corporation. All other trademarks are the property
of their respective owners.
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Communications
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Optical Networking
Multiphase Motor Control
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TYPICAL APPLICATION
32k Point FFT fSMPL = 5Msps,
10µF
1µF
TRUE DIFFERENTIAL INPUTS
NO CONFIGURATION REQUIRED
fIN = 2.2MHz
3.3V OR 5V
1.8V TO 2.5V
0
+
–
IN , IN
SNR = 82.1dB
V
GND
GND
O
V
DD
DD
THD = –88.1dB
SINAD = 81.5dB
SFDR = 90.2dB
ARBITRARY
DIFFERENTIAL
–20
–40
V
V
CMOS/LVDS
SDR/DDR
REFBUFEN
DD
0V
DD
0V
DD
0V
DD
0V
+
–
A
16-BIT
IN1
IN1
S/H
A
SAR ADC
+
–
SDO1
SDO2
SDO3
SDO4
CLKOUT
SCK
A
A
16-BIT
IN2
IN2
S/H
SAR ADC
–60
LTC2325-16
–80
BIPOLAR
UNIPOLAR
+
–
A
A
16-BIT
IN3
IN3
V
V
S/H
SAR ADC
–100
–120
–140
CNV
SAMPLE
+
–
A
A
16-BIT
CLOCK
IN4
IN4
S/H
SAR ADC
REF REFOUT1 REFOUT2 REFOUT3 REFOUT4
1µF 10µF 10µF 10µF 10µF
0
0.5
1
1.5
2
2.5
FOUR SIMULTANEOUS
SAMPLING CHANNELS
FREQUENCY (MHz)
232516 TA01a
232516 TA01b
232516fa
1
For more information www.linear.com/LTC2325-16